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A group of students practice walking at a constant speed until they feel that they are able to reproduce that particular speed at will. To test this, they make ten trials where they use a motion detector to measure the distance that they walk in 3.83 seconds. They measure the following distances: 1.88, 1.93, 1.92, 1.85, 2.02, 1.96, 2.08, 1.88, 1.79, 2.04 m.
What is the best estimate of the uncertainty in any single one of the distance measurements?
Two metal balls A and B of negligible radius, connected by a taut nonconducting thread of length 2.40 m, are floating at rest on Space Station Freedom between two metal bulkheads. Ball A carries charge q, and ball B carries charge 2q.
A block of mass m = 300 g is released from rest and slides down a frictionless track of height h = 70.6 cm. What is the value of the spring constant k
To balance a 40 kilogram automobile wheel and tire, a mechanic must place a 55 gram lead weight 24 centimeter from the center of the wheel. Obtain how far from the center of the wheel was its center of mass before the lead weight was added
The upper end of the string wrapped around the cylinder below is held by a hand that is accelerated upward so that the center of mass of the cylinder does not move as the cylinder spins up. (c) Find the acceleration of the hand.
A 0.15 kg particle moving to the left with a speed of 0.05 m/s, Determine the final velocity of each particle and the fraction of total energy transferred to the 0.27 kg particle
two charges are placed between the plates of a parallel plate capacitor. one charge is q1 and the other is q2 4.50
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet
A small particle of mass 0.225kg is moving on a circle of radius 2m. Find the angular momentum of the particle when its speed is 8m/s
A light ray strikes the glass of an aquarium at an angle of 45o. Determine the angle at which the ray emerges in water
A cylinder with a diameter of 9 microns and a height of 40 microns is composed of Al2O3. Calculate the number of aluminum atoms and the number of oxygen atoms
A large balloon of mass 222 kg is filled with helium gas until its volume is 335 m3. Assume the density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3. Calculate the buoyant force acting on the balloon
What is the shortest height a plane mirror must be so that a person who is 1.6 meters tall is able to see his or her whole body? plan a ray diagram to support your answer.
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